11 ,:,,

PART.1 Instant MessengingIM1996I SEEK YOU (ICQ) IM20069IM IM IM

PART.2 2-1 (Computer-mediated communicationCMC) CMC2002 CMC IM

2-2 2-2-1 2-2-2 2-2-3 CMCCMC IM

2-3

2-3-1

2-3-2

IM

2-3-3

PART.3 3-1

3-2 13-243-3 1.YahooMessenger(69%)MSN(46.8%)2.IM(42.9%)12(32.6%)3.52%IM54.IM(71.2%)(67.1%)(65%)5.(37%)

PART.4 ,1. ex:2. ex:3. ex:4.()ex:5.!!